What are the types of electric fields of electric separators, and what are their electrode structure

Generally speaking, there are three kinds of corona electric field and composite electric field, and the curvature is very large, so that the ore particles have different trajectories and achieve the purpose of sorting, and they are negatively charged or positively charged by high-voltage DC.

Electrostatic fields are often generated by high-voltage DC power supplies. Corona electric field is a type of electric field that is widely used in electrical selection. Composite electric field refers to the electric field combined with the corona electric field and the composite electric field, which is a commonly used electric field in the electric separator, which can attract or repel the charged ore particles, and the other pole is a drum (grounding) with a large plane or diameter, it is the use of two electrodes separated by a certain distance, at this time the corona electric field of partial discharge is generated, one of which is a wire electrode (or corona electrode) with a small diameter, which can make the ore particles between the two electrodes electrified, which can greatly improve the separation effect.

There are three types of electric fields used in the electric separator: electrostatic field, corona electric field and composite electric field.

The electrostatic field is often generated by the high-voltage DC power supply, which can attract or repel the charged ore particles, so that the ore particles can be transported differently and achieve the purpose of separation. Corona electric field is a kind of electric field widely used in electric selection, it is the use of two electrodes separated by a certain distance, one of which is a wire electrode (or corona electrode) with a small diameter, with a large curvature, through a high-voltage DC negative or positive charge, and the other pole is a drum (grounding) with a large plane or diameter, at this time, the corona electric field of partial discharge is generated, which can make the ore particles between the two electrodes charged. The composite electric field refers to the electric field that combines the corona electric field and the composite electric field, which is commonly used in the electric separator electric field, which can greatly improve the sorting effect.

Basically, there are two kinds, single-phase 220V and three-phase 380V, the on-board steam pump is also a compressor, which is DC 12V, and large cars have an air source, so there is no need to prepare a 24V air pump.

One AC 380 volt, one DC, just these two ways!

Classifications of generators include:

Generators: DC generators and alternators; Alternators are divided into: synchronous generators and asynchronous generators (rarely used); Alternators can also be divided into single-phase generators and three-phase generators.

There are many types of generators. In principle, it is divided into synchronous generators, asynchronous generators, single-phase generators, and three-phase generators.

In terms of generation mode, it is divided into steam turbine generators, hydro generators, diesel generators, gasoline generators, etc. In terms of energy, it is divided into thermal power generators, hydroelectric power generators, etc.

Generators are mainly divided into the following types:

1. Wind turbines.

As a new type of power generation system with low cost, reliable operation and no greenhouse gas emissions, the installed capacity of wind power generation system is being widely used in the world with an annual growth rate of more than 30%, and has formed a global industry with an annual output value of more than 5 billion US dollars.

2. Hydroelectric generators.

Hydroelectric generators are power machines that convert the kinetic energy and gravitational potential energy of water into mechanical work (e.g., China's Three Gorges). The best way to generate electricity is nuclear power, but it is more polluting than nuclear power.

3. Synchronous generator.

A synchronous motor that runs as a generator. It is one of the most commonly used alternators. In the modern power industry, it is widely used in hydroelectric power, thermal power generation, nuclear power generation and diesel engine power generation.

4. Alternator.

In daily life, when the alternator is used for the electrical equipment, the electrical equipment often cannot work normally, the reason is that the alternating current output of the generator is not stable enough, and the power regulator is needed to stabilize the voltage, and the AC regulated power supply can make the output voltage accuracy of the generator stable to the range allowed by the normal operation of the electrical equipment.

5. Diesel generator.

Diesel generator set is an independent power generation equipment, which refers to the power machinery that uses diesel as fuel and diesel engine as the prime mover to drive the generator to generate electricity. The whole unit is generally composed of diesel engine, generator, control box, fuel tank, starting and control battery, protection device, emergency cabinet and other components.

Diesel generator sets are divided into the following common types, standby diesel generator sets, commonly used diesel generator sets, and the most basic difference between emergency diesel generator sets:

1) Standby generator set. Under normal circumstances, the power required by the user is supplied by the mains, and the generator set is set up to ensure the basic production and life of the user when the mains limit power is switched off or the power supply is interrupted for other reasons. This kind of generator set is located in industrial and mining enterprises, hospitals, hotels, banks, airports and radio stations and other important power consumption units where the mains power supply is tight.

2) Commonly used generator sets. This kind of generator set operates all year round, and is generally located in areas far away from the power grid (or mains) or near industrial and mining enterprises to meet the construction, production and living electricity consumption in these places. At present, in areas with rapid emergency development, common diesel generator sets with short construction period are needed to meet the needs of users.

This type of generator set generally has a larger capacity.

3) Prepare for the generator set. This type of generator set is to supply power to civil air defense and national defense facilities, and has the nature of a standby generator set in peacetime, and after the destruction of the mains power in wartime, it has the nature of a commonly used generator set. This type of generator set is generally installed underground and has a certain protection capacity.

4) Emergency generator set. For the electrical equipment that will cause major losses or personal accidents due to the sudden interruption of the mains, emergency generator sets are often set up to provide emergency power to these equipment, such as the fire protection system of high-rise buildings, evacuation lighting, elevators, control systems of automated production lines and important communication systems. This kind of generator set needs to install a self-starting diesel generator set, and the degree of automation is required.

First, hydropower generation.

Second, wind turbine power generation.

3. Perpetual motion machine transmission type.

Four diesel engines. Five gasoline engines.

Generators can be divided into DC generators and alternators.

Alternators are classified into the following categories according to different classification methods:

According to the overall structure of the knot, it is divided into five categories.

1) Ordinary alternator (generator that needs to be equipped with voltage regulator when used) (2) Integral alternator (generator and regulator made into a whole generator) (3) Alternator with pump, 4) Brushless alternator (generator that does not need brushes) (5) Permanent magnet alternator (generator made of magnetic pole and permanent magnet) is divided into four categories according to the rectifier structure.

1) Six-tube alternator.

2) Eight-tube alternator.

3) Nine-tube alternator.

4) Eleven-tube alternator.

There are many brands of diesel, gasoline, and single-cylinder.

At present, there are many types of printers on the market, and each printer has different consumables and different uses.

The following distinguishes the types according to their working principles, and introduces the principles, advantages and disadvantages of printers respectively.

1- Laser printer.

A common printer in the office, which is generally used to print ordinary document materials.

Laser heating is used to fix the toner on the paper, which enables the printing function.

The usual filament is toner, and the paper used is ordinary paper, which is generally printed in black and white.

There is also a consumable that is a toner cartridge, but it is not replaced frequently).

2- Inkjet printer.

It is generally used to print color materials.

Ink is sprayed onto the paper for printing functionality.

The usual consumables are ink, and the paper used is ordinary paper, which can generally be printed in color.

In addition, there is also a consumable is the ink cartridge, some models do not have to be replaced frequently) 3-dot matrix printer.

It is generally used to print bills, or paper that needs to be pressed for printing.

The ink on the ribbon is pressed onto the paper to achieve the printing function.

The usual filament is ribbon, and the paper used is multi-linked paper, which can generally be printed in black and white.

4- Thermal printer.

It is commonly found at the cash register and is generally used to print receipts.

Heats the paper for printing functions.

The usual consumables are thermal paper, and the paper used is thermal paper, which can generally be printed in black and white.

Printer differences.

Different printers have differences in terms of **, use, appearance size, etc.

Printer routine general maintenance.

All printers run out of paper, so you only need to replace the paper.

The rest of the maintenance is to replace the consumables in a timely manner. (Due to the complex structure of the organic type, it may be necessary for professionals to replace the consumables).

Functional expansion. Generally, printing needs to be connected to a computer in order to work properly. Some printers offer some extended functionality. For example, network sharing printing, mobile phone connection printing (wifi or Bluetooth), etc.

Classified by principle.

According to the working principle of printers, printers are divided into two categories: percussive and non-percussive.

String dot matrix character non-impact printer.

There are two main types of inkjet printers and thermal printers.

Inkjet printers. The most widely used printer. The basic principle is that the charged inkjet mist dots are deflected by the electrodes to form the desired glyph directly on the paper.

The advantage is that the dots that make up the characters and images are much smaller than dot matrix printers, resulting in high resolution of the character dots and high print quality and clarity. Character size and font can be changed flexibly and conveniently. Printing is done on plain paper, but this typewriter can also be used to print directly on certain products.

There is no mechanical wear and tear in the formation of characters and graphics, and the energy consumption of printing is low. Printing speed is achievable.

500 characters in seconds. Charge-controlled (high-pressure) and random inkjet (negative pressure) inkjet technologies are widely used, and in recent years, dry inkjet printing technology has emerged.

Thermal printers. The heat generated by the pulse current flowing through the resistor at the tip point is transferred to the thermal paper, causing it to change color when heated.

Thus printing characters and images.

The main features are noiseless, light and small structure, and clear printing. The disadvantages are slow speed and poor handwriting preservation.

Line dot matrix character non-impact printer.

There are mainly laser, electrostatic, magnetic, and light-emitting diode printers.

Laser printer. After the laser beam emitted by the laser source is modulated by the acousto-optic deflector controlled by the character lattice information, it enters the optical system, and scans the rotating photoreceptor transversely through a multi-faceted prism, so that the electrostatic latent image of the character or image is formed on the optical guide film layer on the photoreceptor drum, and then the required character or image is obtained on the paper after development, transfer and fixing. The main advantage is that the printing speed is high, reachable.

More than 20,000 lines. The printing quality is high, the noise is low, ordinary paper can be used, and characters, graphics and images can be printed. Due to the high printing speed, from a macro point of view, it is like printing one page at a time, so it is also called a page printer.

Electrostatic printers. The impulse voltage is applied directly to a special paper with a layer of dielectric material in order to obtain an electrostatic latent image on the dielectric, which is developed and heated to form characters and images. It is characterized by high printing quality, non-fading handwriting, long-term storage, low power consumption to generate latent images, no noise, simple and reliable.

However, special paper is required and the cost is high.

Magnetic printers. It is the application and development of electronic photocopying technology. The use of magnetic-sensitive media to form a latent image of characters does not require a high-power laser source, which has the advantage of being insensitive to humidity and temperature changes. The printing speed can reach 8000 lines. The structure is simple and the cost is low.

Light-emitting diode printers. Except for the use of light-emitting diodes as the light source, its working principle is similar to that of laser printers. The use of light-emitting diodes reduces costs and power consumption.

Laser, the investment is large, but the consumables in the future are cheap. Inkjet, less investment, expensive consumables. Needle type, professional billing, the use of ribbon, the above two can not be replaced.

Inkjet, dot stick, laser 3 kinds of inkjet for printing** delicate level dot type used to print bills, laser used to print text.

Printers are divided into white dot matrix printers

DU inkjet printer, laser printing zha machine, three kinds of laser printer dao printing effect version is good, the right of the word three-dimensional sense is strong, but can not play A4 or more large paper, can not play wax paper;

Inkjet printers are cheap, but the consumables are expensive, and the effect is not as good as that of laser printers;

The dot matrix printer is durable, can play large paper like A3, and can also play wax paper, but the printing speed is slow, the words are a little hairy, and the three-dimensional sense is not strong

The types of hoists are:

There are many, such as: vertical hoist, bucket hoist, hydraulic hoist, multi-function hoist, tower hoist, floor hoist, material hoist, mine hoist, continuous hoist and so on.

Different types of hoists are suitable for different scenarios, and when purchasing, you need to determine what kind of hoist to buy according to actual needs.

-Yugong Construction Machinery.

The most commonly used types of hoists: vertical hoists, reciprocating hoists, spiral hoists, etc.

Multi-rope friction hoist, single rope winding hoist.

There are many lifting oils, such as: vertical elevators, bucket elevators, hydraulic elevators, multi-functional elevators, etc.

Henan Three Brother Heavy Industry is mainly produced are hoists, if you want to buy are hoists, do not put on Henan Three Brother Heavy Industries ** to see, you can also call Three Brother Heavy Industries **** for detailed consultation and purchase.

1. Control buttons.

The control button, referred to as the button, is a simple structure and widely used manual master electrical appliances. It is used in the control circuit for long-distance manual control of electromagnetic electrical appliances, and can also be used to convert various signal circuits and electrical interlocking circuits.

The control button is generally composed of a button, a return spring, a contact and a housing. Its structure is shown in Figure 1, and the graphics and text symbols are shown in Figure 2. The form and number of contacts in the button can be assembled into 1 normally open and 1 normally closed to 6 normally open and 6 normally closed according to the need.

When wiring, it is also possible to connect only normally open or normally closed contacts.

Commonly used push button switches are LA2, LA4, LAL0, LA18, LA19, LA20, LA25, LA32, LA38, LA1, LAY3, LAY4, LAY6, LAY37 (PBC) and other products.

Second, the travel switch.

The travel switch is mainly used to detect the position of the working machine and issue commands to control its direction of movement or the length of the stroke. According to the structure, the travel switch is divided into the contact type with contact with the mechanical structure and the non-contact proximity switch with the electrical structure.

The contact type travel switch relies on the moving object to collide with the operating head of the travel switch and make the normally open contact of the travel switch open and the normally closed contact to break, so as to realize the control of the circuit.

3. Universal transfer switch.

Universal transfer switch is a multi-gear, multi-stage, multi-loop control of the main electrical appliances, when the operating handle rotates, drive the cam inside the switch to rotate, so that the contact is closed or disconnected according to the specified order.

The universal transfer switch is generally used in the circuit of AC 500V, DC 440 V, and the agreed heating current of less than 20 A, as the conversion of electrical control lines and the long-distance control of power distribution equipment, the conversion of electrical measuring instruments, and can also be used for the direct control of small-capacity asynchronous motors, servo motors, and micro-motors.

Fourth, the master controller.

The master controller is a master electrical appliance used to convert complex multi-channel control circuits more frequently. It is generally composed of contacts, cams, positioning mechanisms, rotating shafts, panels and their supporting parts. It is light to operate, allows for a high number of power connections per hour, and has a bridge structure with double breaks, making it suitable for sequential operation of multiple control loops.

The main command controller is mainly used for the electric drive control system of rolling steel and other production machinery and the electric drive system of large cranes, and is used for remote control of the starting, braking and speed regulation of the motor.

5. Proximity switch.

Proximity switches are used in control circuits for position detection, stroke control, counting control and detection of the presence or absence of metal objects. The domestic proximity switch products are mainly LJ5 series with integrated components.

According to the principle of action, proximity switches include high-frequency oscillation type, capacitive type, induction bridge type, permanent magnet type and Hall effect type, among which high-frequency oscillation type is the most commonly used. The latter is divided into inductive or capacitive type.